Chair control mechanism



FIG. 1 is a perspective view of chair control mechanism showing the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portions of the figures shown in dashed lines do not form part of the design. 

The ornamental design for chair control mechanism, as shown and described. 